#ifndef CUSTOMSHADOWMAP_BASE_INCLUDE
#define CUSTOMSHADOWMAP_BASE_INCLUDE

float4 tex2Dproj(sampler2D s, in float3 t)              { return tex2D(s, t.xy / t.z); }

    TEXTURE2D(_SGameShadowMap); SAMPLER(sampler_SGameShadowMap);
	half _SGameShadowBias; half _SGameShadowStrength;
	float4x4 _ShadowMatrix;

	inline float4 GetCustomShadowCoords(float3 worldPos)
	{
		return mul(_ShadowMatrix, float4(worldPos, 1));
	}

	inline float GetCustomShadowAtten(float4 shadowCoords)
	{
		#if defined(SHADER_API_MOBILE)
			float lightDepth = SAMPLE_TEXTURE2D(_SGameShadowMap, sampler_SGameShadowMap, shadowCoords.xy / shadowCoords.w).r;
		#else
			float lightDepth = 1 - SAMPLE_TEXTURE2D(_SGameShadowMap, sampler_SGameShadowMap, shadowCoords.xy / shadowCoords.w).r;
		#endif

		float atten = lerp(1, 0.35, step(lightDepth, (shadowCoords.z - _SGameShadowBias)));
		// float atten = (shadowCoords.z - _SGameShadowBias) < lightDepth ? 1 : 0.5;
		// atten = lerp(1, atten, _SGameShadowStrength);
		// atten = pow(atten, 2);
		atten = lerp(atten, 1, step(0.99 , shadowCoords.x));
		atten = lerp(atten, 1, step(0.99 , shadowCoords.y));

		return atten;
	}

	#if defined(_PROJECTOR_ON)
		float4x4 _ProjectorVP;
	    TEXTURE2D(_ProjectorTex); SAMPLER(sampler_ProjectorTex);
		inline float4 GetProjectorUV(float4 vertex, float4x4 o2wMat)
		{
			float4x4 propMVP = mul(_ProjectorVP, o2wMat);
			float4 projProjPos = mul(propMVP, vertex);
			projProjPos = ComputeScreenPos(projProjPos);
			return projProjPos;
		}

		inline float3 GetProjectorColor(float3 oriCol, float4 projUV)
		{
			return oriCol + SAMPLE_TEXTURE2D(_ProjectorTex, sampler_ProjectorTex, projUV).rgb;
		}
	#endif
#endif